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    <title>freson</title>
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    <center>Scilab Function</center>
    <div align="right">Last update : April 1993</div>
    <p>
      <b>freson</b> -  peak frequencies</p>
    <h3>
      <font color="blue">Calling Sequence</font>
    </h3>
    <dl>
      <dd>
        <tt>fr=freson(h)  </tt>
      </dd>
    </dl>
    <h3>
      <font color="blue">Parameters</font>
    </h3>
    <ul>
      <li>
        <tt>
          <b>h</b>
        </tt>: <tt>
          <b>syslin</b>
        </tt> list</li>
      <li>
        <tt>
          <b>fr</b>
        </tt>: vector of peak frequencies in Hz</li>
    </ul>
    <h3>
      <font color="blue">Description</font>
    </h3>
    <p>
    returns the vector of peak frequencies in Hz for the SISO plant
    <tt>
        <b>h</b>
      </tt>
    </p>
    <h3>
      <font color="blue">Examples</font>
    </h3>
    <pre>

h=syslin('c',-1+%s,(3+2*%s+%s^2)*(50+0.1*%s+%s^2))
fr=freson(h)
bode(h)
g=20*log(abs(repfreq(h,fr)))/log(10)
 
  </pre>
    <h3>
      <font color="blue">See Also</font>
    </h3>
    <p>
      <a href="frep2tf.htm">
        <tt>
          <b>frep2tf</b>
        </tt>
      </a>,&nbsp;&nbsp;<a href="../graphics/zgrid.htm">
        <tt>
          <b>zgrid</b>
        </tt>
      </a>,&nbsp;&nbsp;<a href="../robust/h_norm.htm">
        <tt>
          <b>h_norm</b>
        </tt>
      </a>,&nbsp;&nbsp;</p>
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